Feed-water-heating attachment for boilers



J. H. MATHEWS. FEED WATER HEATING ATTACHMENT FOR BOILERS.

Patented Aug. 2, 1887.

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UNITED STATES PATENT OFFICE.

JOSEPH H. MATHEIVS, OF BERKELEY, CALIFORNIA.

F'EED-WATER-HEATING ATTACHMENT FOR BOILERS.

SPECIFICATION forming part of Letters Patent No. 367,647, dated August 2, 1887.

Application tiled February 17. 1887.

To all who/wit may concern:

Be it known that I, JOSEPHI-I. MATHEWS, of Berkeley, county of Alameda, and State of California, have invented an Improvement in Fecd-VVater-I'Ieating Attachments for Boilers; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the class of boilers and to an improvement in the means for heatiug and introducing feed-Water; and my invention consists in a pipe connected with the water-feed and extending within the water-space backwardly beside the arch of the adjacent furnace to a point near the combustioachanr her at the rear, and thence upwardly and in- Ward] y over the top of the arch and beneath the tube-box to the space between the tubeboxes, and then upwardly in said space to a point above said tube-boxes and just below the level of the water in the boiler.

The object of my invention is to provide an attachmentfor heating thoroughly the i'eedwater introduced into the boiler.

Referring to the accompanying drawings, Figure 1 is an end elevation of a boiler, showing the application of my attachment. Fig. 2 is a side elevation, a portion of the outer shell being broken away to show the interior.

A is the boiler having the furnaces Band the tubes 0.

D is the water-feed let into the shell at a point near its forward end, as shown in Fig. 2.

E is a pipe connected with the water-feed, and thence extending horizontally and backwardly in the water space beside the arch of the adjacent furnace to a point near the com bustionchamber, as shown in Fig. 2, whence it turns upwardly to a horizontal plane slightly above the furnace-arch, whence it extends inwardly and horizontally, as shown in Fig. 1, just above the furnace-arch and below the tubes to the space F between the tube-boxes, whence it turns again and passes upwardly between the boxes to its outlet at the point e,

which is just below the level of the water in the boiler. I

On the top of the pipe is secured a vertically-adj ustable scattering-plate, G. Suitable elbows are, of course, let into the length of the pipe to provide for its various turns. It will be seen that this course of the pipe carries it in close proximity throughout its entire length to the hottest portions of the furnace,

for in its first course it passes along the furnace arch; in its second course over said furnace-arch and under the tubeboxes, and in its third course between the tube-boxes, whereby the water which passes through it is thoroughly heated. Its outlet being above, the tubes will not affect them, and by thus introducing the feed-water the water in the bottom of the boiler will be at as high a tcmperature as that in the top, thereby avoiding undue expansion and contraction.

This pipe maybe applied to any boiler without changing said boiler, the principle being to carry it in close proximity to the hottest portions.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A feed-water-lieating attach ment for boilers, consisting of the pipe E, connected with the water-feed and thence passing within the water-space backwardly beside the adjacent furnace-arch and thence upwardly and inwardly between the top of the furnace-arch and the bottom of the tube-box, thence upwardly between the tube-boxes to a point below the water-level, where it opens out, substantially as described.

In witness whereof I have hereunto set my hand.

JOSEPH H. MATHEWS.

\Vitnesses: I i

S. H. NoURsE, H. 0. LEE. 

